baber/WOPTO huggingface dataset:
Patent KR-20000031639-A (KR)
Title: Method and device for supplying detergent to washing machine
Inventor: KIM SEONG BUM
IPC: D06F39/02
Filed: 1998-11-09
Abstract: PURPOSE: A method and a device for supplying a detergent are provided to improve the melting rate of a powdered detergent and to be conveniently used. CONSTITUTION: Water is supplied into an accepting room(42) of a container(40), a microcomputer(80) drives an agitator(50) and a powdered detergent is melted by agitating water and the driving of the agitator(50). When a first magnet(56) is rotated with a shaft(54) by the driving of a motor(52), the powdered detergent is effectively melted by agitating water and the powdered detergent during rotating a second magnet(58) in a bottom of the container(40). The second magnet is limited the rotating position by shielding with a lattice-shaped housing(60). Because the second magnet(58) is rotated individually with the motor(52) by embedding in the accepting room(42) of the container(40), the leakage according to the installation of the agitator(50) is prevented.
Patent KR-20000031802-A (KR)
Title: Ac power multi-variable control system using semiconductor device
Inventor: LEE JONG MIN
IPC: H02M5/22
Filed: 1998-11-10
Abstract: PURPOSE: An AC power multi-variable control system using semiconductor device is provided to simplify a circuit and improve reliability by replacing a prior relay circuit with a control element and a variable control device. CONSTITUTION: An AC power multi-variable control system includes a transformer(T1) for reducing a primary AC power into a secondary AC power. The secondary AC power is passed by control elements(20-1,20-2) which are coupled to a plurality of taps of the transformer(T1). A 0-crossing of the secondary AC power is detected by variable control devices(21-1,21-2) to be used as a signal for determining a turn-on operation of the control elements(20-1,20-2). The AC powers output from the control elements are rectified by a bridge diode(BR1). The rectified power from the bridge diode(BR1) is smoothed by a condenser(C1). The smoothed power from the condenser(C1) is output as different voltages by output drive transistors(PD1,PD2,PT1,PT2).
Patent KR-20000032031-A (KR)
Title: Capacitor of semiconductor device
Inventor: SONG IN YEONG
IPC: H01L27/108
Filed: 1998-11-12
Abstract: PURPOSE: A capacitor of a semiconductor is provided to minimize a gap and a lodge part without forming an additional conductive layer. CONSTITUTION: To produce the capacitor of a semiconductor device, a dopant area(21) is formed on a P-type semiconductor substrate(20) to be used as a drain area and a source by doping N-type dopants such as Arsenic or phosphorus with a high concentration. Then, an interlayer dielectric(22) is positioned on the semiconductor substrate to form a contact hole by removing a certain part of the interlayer dielectric with photo lithography. A first lower electrode(28) is positioned at a certain part on the interlayer dielectric including the upper surface of a contact plug(23). Then, the first lower electrode(28) is formed by patterning a first metal wire layer in a logic part and a cell part with photo lithography. Therefore, the first to the third lower electrodes(28,29,30) are located between interlayer dielectrics to be butted with first and second barrier metal layers(32,33). Moreover, first to fourth interlayer dielectrics(24,25,26,27) are intervened between the first and the second barrier metal layers to play a role of a dielectric film.
Patent KR-19990024064-A (KR)
Title: 디메틸테레프탈레이트 부산물을 이용한 폴리우레탄의 제조방법
IPC: C08G18/28
Filed: 1998-11-19
Abstract: 본 발명은 디메틸테레프탈레이트(Dimethylterephthalate : DMT) 부산물을 이용한 폴리우레탄의 제조방법에 관한 것으로, 그 목적은 DMT제조공정에서 발생되는 부산물인 DMT슬러리로부터 DMT슬러리베이스 폴리올(Polyol)을 합성하여 폴리우레탄제조시 원료로 사용되는 폴리올로 재활용할 수 있도록 한 것이다. 
     본 발명의 일실시예는 촉매의 존재하에서 용제를 이용하여 DMT슬러리와, 활성화 수소물질을 90∼100℃의 온도범위에서 완전히 용융시키고, 이후 서서히 승온(昇溫)시키면서 180∼250℃의 온도범위에서 완전히 반응시킨 후 냉각시켜 DMT슬러리베이스 폴리올을 제조하는 단계와;  DMT슬러리베이스 폴리올과 사전에 준비된 폴리올 및 각종 첨가제를 투입하여 예비 혼합물을 만든 후, 적정량의 이소시아네이트 화합물과 혼합하고 일정한 형태의 금형에 넣어 경질의 폴리우레탄 제품을 제조하는 단계를 포함한다. 
     본 발명의 다른 실시예는 촉매의 존재하에서 용제를 이용하여 DMT슬러리와, 활성화 수소물질을 90∼100℃의 온도범위에서 완전히 용융시키고, 이후 서서히 승온(昇溫)시키면서 180∼250℃의 온도범위에서 완전히 반응시킨 후 냉각시켜 DMT슬러리베이스 폴리올을 제조하는 단계와; 준비된 이소시아네이트 화합물과 상기 DMT슬러리베이스 폴리올과 각종 첨가제 혼합물을 교반하여 사전에 정량한 폐 폴리우레탄 폼의 스크랩에 투입한 후 교반하여 혼합하고, 일정한 형태의 금형에 넣어 재활용된 경질의 폴리우레탄 제품을 만드는 단계를 포함한다.
Patent KR-20000033409-A (KR)
Title: Photo album, attendance book having photo album and notebook for school affairs
Inventor: KIM PILL SENG
IPC: B42D15/00
Filed: 1998-11-23
Abstract: PURPOSE: A photo album, an attendance book having the photo album and a notebook for school affairs are provided to easily check the attendance and study state and to be quickly familiar with the faces of students. CONSTITUTION: A photo album is composed of a transparent main film(353) having an inserting space part(352) and a transparent sub-film(355). The transparent sub-film is arranged at a certain interval according to a length direction on both side faces of the main film and is formed with a photo accepting part(354) where a photo is inserted based on each width direction. A recording space(356) is prepared on the ground paper to record names or other contents and is prepared in a position corresponding to an exposed part between the sub-films. Accordingly, the study state based on the counsel of students is well confirmed with the notebook(300) for school affairs having the photo album. Further, the faces of students are quickly familiarized through the photo album.
Patent KR-20000033727-A (KR)
Title: Plasma display device
Inventor: SHIN GYO JIN
IPC: H01J11/32
Filed: 1998-11-25
Abstract: PURPOSE: A plasma display device is provided for preventing electrodes of adjacent cells from discharging each other by making a wall charge developed by a discharge initiate voltage remaining in the cell. CONSTITUTION: A plasma display device includes a compartment(3), a fore board (1), a backboard (2), and a first and a second electrode groups. The fore board (1) and the backboard(2) are combined with a predetermined distance by the compartment(3). The first electrode group is formed on one of the boards(1,2). In the first electrode group, a plurality of electrode are paired. The second electrode group is formed on the other board and forms a plurality of discharge cells. At the region of discharge cell is formed a discharge hole with a predetermined depth.
Patent KR-20000038011-A (KR)
Title: Silica glass forming mold using sol-gel process
Inventor: OH JEONG HYEON
IPC: B29C43/00
Filed: 1998-12-03
Abstract: PURPOSE: A silica glass forming mold using a sol-gel process is provided which is able to minimize the stress given to the inside of the gel and effectively prevent the surface of the gel from being damaged when a mandrel is removed from the tube in the process of de-molding. CONSTITUTION: In the silica glass forming mold using a sol-gel process having a tube(21) and a mandrel(22) which is placed in the center of the tube(21), the mandrel(22) is taper-treated and when the diameter of one end of the mandrel(22) is D, the diameter of the other end is D plus or minus delta and the delta is 0.02-0.1% of the length(L) of the mandrel(22).
Patent KR-20000041533-A (KR)
Title: Process for forming wood color and pattern on steel, plastic, rubber and glass
Inventor: LEE GAIO SEIBE
IPC: B05D5/00
Filed: 1998-12-23
Abstract: PURPOSE: A process for forming wood grain patterns on the surface of steel, plastic, rubber and glass using urethane paint and a solvent is provided which can form wood grain patterns being full of a natural impression in a simple manner. CONSTITUTION: A process comprises blending 0.5L luminous material, 400g chestnut-colored pigment and 4L toluene, coating on the surface of steel, plastic, rubber and glass and heating at 30°C for about 10 min. The process can form various colors and wood grain patterns at a desired position, helps distinguishing articles in night time and lengthens the life of a coating.
Patent KR-20000042991-A (KR)
Title: Fabrication method of glass lid of solid state image sensor
Inventor: LEE GUEN HWA
IPC: H01L27/146
Filed: 1998-12-28
Abstract: PURPOSE: A fabrication method of a glass lid of a solid state image sensor is provided to improve productivity. CONSTITUTION: In a solid state image sensor, a glass lid is used to protect a CCD chip and to let a light penetrate. To fabricate the glass lid, a circular glass lid plate is provided with a ring frame(3) by an adhesive tape(2). The circular glass lid plate is then sawed into individual glass lids(5a) by a cutter. At this time, top edges of the individual glass lids(5a) are grinded simultaneously with the sawing by the cutter. Next, the individual glass lids(5a) are cleaned to remove resultant particles produced by the sawing and grinding, and then dried. Subsequently, a mask(8) having holes(8a) therein is mounted on the individual glass lids(5a) so that the respective holes(8a) expose the edges of the individual glass lids(5a). Next, adhesive materials(6) are applied into the respective holes(8a) by printing, and then cured. Finally, each individual glass lid(5a) is detached from the adhesive tape(2).
Patent KR-20000043102-A (KR)
Title: Clock frequency converting apparatus of digital signal receiving device
Inventor: SON TAE YONG
IPC: H04N5/44
Filed: 1998-12-28
Abstract: PURPOSE: A clock frequency converting apparatus is provided to prevent an omission or a duplication phenomenon in processing a video signal by providing a corresponding clock frequency to a corresponding block. CONSTITUTION: A switching unit(208c) selects one of the clock frequencies outputted from first and second phase locked loops(208a, 208b). A controller(212) controls the switching unit(208c) to output a clock frequency corresponding according to a frame rate of an inputted digital signal. The first phase locked loop(208a) generates a clock frequency of 74.25MHz and the second phase locked loop(208b) generates a clock frequency of 74.175MHz. The controller(212) controls the switching unit(208c) to select one of the clock frequencies from the first and second phase locked loops according to frame rates.
Patent KR-20000045118-A (KR)
Title: Remote network synchronous apparatus of full electronic exchange
Inventor: JEONG JAE YEOL
IPC: H04L7/00
Filed: 1998-12-30
Abstract: PURPOSE: A remote network synchronous apparatus is provided to improve a reliability by duplicating a reference clock reception function, and to be easy to install and maintain by receiving the apparatus to a 1/2 shelf. CONSTITUTION: A remote network synchronous apparatus comprises a first circuit pack(network synchronous buffer board assembly,NSBA-1)(100) and a second circuit pack(network synchronization local master clock generation board assembly,NSLA)(200). The first circuit pack(100) consists of a reference clock receiving part(110), a slip detecting part(120), a reference clock generating part(130) for a phase difference detection, a clock distribution maintenance part(140), a clock receiving part(150) and a clock distribution part(160). The first circuit pack(100) receives a reference clock to output a phase difference comparison reference clock to the second circuit pack(200), performs a slip detection function, a clock distribution function and a maintenance function, and receives a clock from the second circuit pack(200) to generate a clock necessary for a time switch. The second circuit pack(200) consists of a reference clock receiving part(210) for a phase difference detection, a phase difference detector(220), a memory part(230) for an IPC, a lower processor communication part(240), an IPC communication part(250), a microprocessor control part(260), a D/A converter(270) and a main clock generating part(280). The second circuit pack(200) detects a phase difference between the reference clock and an internally generated clock, and performs a DP-PLL control function and a matching function with a lower processor.
Patent KR-20000046489-A (KR)
Title: Chamber seasoning method for increasing mean cleaning cycle of chamber
Inventor: WOO BONG JU
IPC: H01L21/02
Filed: 1998-12-31
Abstract: PURPOSE: An improved chamber seasoning method is provided to increase a mean cleaning cycle of a chamber in a process for forming a tungsten plug. CONSTITUTION: Before or During the process for forming a tungsten plug, a chamber is seasoned after a dry clean operation and before a wafer is introduced into the chamber. In particular, for the seasoning method, chlorine gas or chloride gas such as boron chloride is employed with an etch gas or alone to remove contaminations such as aluminum oxide that occur naturally within chamber components. The etch gas may include sulfur fluoride, argon, or nitrogen. Furthermore, the chlorine or chloride gas removes contaminations such as aluminum fluoride that occur by the use of the fluoride gas as the etch gas. In a conventional seasoning method, contaminations are increased when approximately seven hundred twenty five wafers have been treated. On the other hand, the improved seasoning method controls the occurrence of contaminations until approximately one thousand two hundred seventy five wafers are treated.
Patent KR-20000046726-A (KR)
Title: Manual water level controlling device of washing machine
Inventor: KIM CHA GWANG
IPC: D06F39/08
Filed: 1998-12-31
Abstract: PURPOSE: A manual water level controlling device of a washing machine is provided which cam make the users convenient and can save energy by making the water level set freely at user's will CONSTITUTION: A manual water level controlling device of a washing machine is characterized as follows: a selecting switch, a selecting device to control water level is formed in a panel(5); a changing resistor(2), a device to set water level is installed to be possible to be slid on the panel(5); resistance of the changing resistor(2) and the partial pressure value of a partial pressure resistance through the selecting switch is input and connected with water level in a part to input a controlling signal.
Patent KR-20000047325-A (KR)
Title: Disposable absorbent article
Inventor: LEE GAB JU
IPC: A61F13/76
Filed: 1998-12-31
Abstract: PURPOSE: A disposable absorbent article is provided which gives a leak preventing effect by forming a leg band as a leak preventing means at the adhesive point between the absorbent core and a barrier cuff, and endows a super breathable property by effectively designing the water impermeable back-sheet, so it prevents effectively skin from being sore. CONSTITUTION: In disposable absorbent article having a liquid permeable top-sheet, a liquid impermeable back-sheet, an absorbent core composed of fluff pulp, super absorbent polymer and tissue, a concluding means and a leak preventing means, a disposable absorbent article is characterized that a water-proof film and a nonwoven is adhered to the liquid impermeable back-sheet by heat or glue, the width of the water-proof film is formed narrower than the width of the nonwoven, the leak preventing means is composed of a leg elastics and the barrier cuff at the both outsides of the absorbent core, the leg elastics is formed at the inner part of barrier cuff adhesion part, and the barrier cuff is comprised of a barrier cuff elastics, a barrier cuff flap and the end of barrier cuff adhesive part.
Patent KR-19990035812-A (KR)
Title: 하이브리드 필터 시스템 및 공정유체의 여과 방법
IPC: B01D46/24
Filed: 1996-07-25
Abstract: 본 발명은 역세척 수용기(12)를 이용하는 하이브리드 필터 시스템과 공정유체의 여과방법에 관한 것이다. 일회용 또는 역세척용 필터 요소를 지지하도록 설계된 튜브 시트 조립체(14)는 역세척 수용기(12)내의 다른 유형의 필터 요소를 단단하게 고정시키는데 사용된다. 상기 튜브 시트 조립체(14)는 역세척 수용기(12) 내에 제거가능하게 장착되며, 주어진 여과 용도에 따라 용이하게 교환될 수 있다. 상기 하이브리드 필터 시스템(10)은 공정 변수에 따라 일회용 필터 요소 또는 역세척용 필터 요소와 결합되어 있는 역세척 수용기(12)를 이용한다.
Patent KR-20000064300-A (KR)
Title: 선회식 또는 슬라이딩식 백보드
IPC: B60J5/10
Filed: 1997-08-27
Abstract: 선회식 또는 슬라이딩식 차량용 백보드의 무게가, 가벼운 재료를 사용하고 이에 상응하는 백보드의 내피와 외피를 설계함으로써 감소된다. 백보드(1)는 폐쇄형 또는 개방형 형상으로 된 강제 지지프레임을 가진다. 외피(3)와 내피(4)는 경금속 또는 플라스틱으로 제조되며 지지프레임(2)에 고착되어 있다. 내피(4)는 실질적으로 보강리브(14)와 레일(19)에 의해 형성된다. 이 백보드는 승용차에 특히 적합하다.
Patent KR-19990076664-A (KR)
IPC: A61P29/00
Filed: 1996-12-23
Abstract: 1-Hydroxy pregnacalciferol derivatives of formula (I) and their corresponding 5,6-trans isomers wherein R1 is hydroxyl or lower alkoxy and R2 is optionally hydroxylated or lower alkoxylated lower alkynyl or R1 is C(RA) (RB)CH3 where RA is optionally hydroxylated or lower alkoxylated lower alkynyl and RB is hydroxyl or lower alkoxy or RA and RB together represent oxo and R2 is hydrogen, hydroxyl or lower alkoxy, and R3 and R4 represent hydrogen atoms, exhibit anti-progesterone activity and may be useful as antineoplastic, antifertility, antiproliferative, immunosuppressive and/or antiinflammatory agents.
Patent KR-19990081998-A (KR)
Title: 비결정성 폴리이미드를 함유하는 열가소성 수지 조성물
IPC: C08L67/02
Filed: 1997-11-21
Abstract: 본 발명은  방향족 폴리에스테르 및 비결정성 폴리이미드로 이루어진 열가소성 수지조성물,  예를들어,  성형성 및 결정성이 훨씬 개량되고,  성형의 방출에 대한 문제가 없고,  형광을 억제하며,  내후성 및 내델라미성이 우수한  폴리알킬렌 나프탈레이트 수지 조성물에 관한 것이다.
Patent KR-19990087140-A (KR)
Title: 반도체 소자
IPC: H01L29/417
Filed: 1997-09-26
Abstract: 전형적인 깍지끼움 형태의(interdigitated) 소스/드레인 구성을 갖는 측방향 DMOS 트랜지스터에서 저 전류 값에 비하여 강 전류에서 전기 항복을 저 전압으로 발생시키는 것이 가능하다. 본 발명은 드레인 핑거의 단부면에서 전류의 집중과 그에 연관된 키르크 효과에 기인하여 드레인 핑거의 단부면에서 상술한 항복 현상이 발생한다는 인식을 기초로 한다. 트랜지스터의 SOAR(안정 동작 영역)을 증가시키기 위하여, 소스 핑거(6)를 국부적으로 중단시켜서 드레인 핑거(7)의 팁(11)이 동작하지 못하게 한다. 본 발명의 바람직한 실시예에서, 소스 핑거들은 드레인 핑거들의 단부에서 드레인 핑거들보다 짧게 형성된다.
Patent KR-19990087587-A (KR)
Title: 복수 부분의 머리 밴드와 마스크 조립체 및 그 제조 방법
IPC: A62B7/00
Filed: 1997-02-03
Abstract: 본 발명은 얼굴 마스크 블랭크에 부착 가능한 복수 부분의 머리 밴드와 그 부착 방법에 관한 것이다.  복수 부분의 머리 밴드의 단위 길이는 얼굴 마스크 블랭크의 표면을 따르거나 부착 위치를 가로지르는 축선을 따라 측정된 부착 위치 사이의 거리에 상응하는 길이이므로, 고속 제조 장비를 이용하여 재료를 다루고 부착하기 용이하다.  대략 상기 머리 밴드 경로를 따라 연장된 하나 이상의 종방향 새김선이 머리 밴드 재료에 형성됨으로써, 하나 이상의 종방향 새김선에 의해 복수 부분의 머리 밴드가 규정된다.   상기 얼굴 마스크 블랭크에는 성형된 컵 형태의 얼굴 마스크, 평평하게 접힌 얼굴 마스크 또는 그 밖의 여러 가지 얼굴 마스크 구조가 포함된다.
Patent KR-20000004978-A (KR)
Title: Semiconductor integrated circuit
Inventor: KUHLMANN WERNER
IPC: H01S5/00
Filed: 1997-03-13
Abstract: PURPOSE: A semiconductor integrated circuit having a protective circuit for discharging an over voltage and an electrostatic charge is disclosed. CONSTITUTION: The semiconductor IC comprises a component(3) which is formed on a semiconductor substrate (2) and comprises an active PN junction (6) formed between a first semiconductor region (4) with a first type of conductivity and a second semiconductor region (5) with a second type of conductivity; and a protective circuit (8) which is associated with the component (3) for discharging over voltages and electrostatic charges. The protective circuit (8) associated with the component (3) comprises a protective PN junction (9)which is formed on a semiconductor carrier (7) and has a first semiconductor carrier region (10), which is disposed in the semiconductor carrier (7) and has the first type of conductivity, and a second semiconductor carrier region (11) having the second type of conductivity. The second semiconductor carrier region (11) with the second type of conductivity is electrically coupled to the first semiconductor region (4) with the first type of conductivity formed in the semiconductor substrate (2).
Patent KR-20000005173-A (KR)
Title: Fixing element and ligament fixed with fixing element
Inventor: LO KOKBING
IPC: A61F2/08
Filed: 1997-04-01
Abstract: PURPOSE: A fixing element fixes a ligament to a bone part such that it is very simple to hold the ligament to or vary tension respectively to replace a fixed ligament with another. CONSTITUTION: A fixing element for connecting a ligament(2) to a bone part(3,4) comprises a hollow, a substantially cylindrical element(11) fixable in a continuous opening(5,6) in a bone part(3,4), and an engaging element(13) for a ligament(2) anchorable in a cylindrical element(11) at least at two mutually differing axial positions. By rotating engaging element(13) relative to cylindrical element(11) the former will be displaced in axial direction and this axial displacement of engaging element(13) will change the tension on a ligament(2). By placing for instance a spanner(15) in recesses(16) arranged in the end wall of engaging element(13) the tension on a ligament(2) can be varied in very simple manner. For fixing of an engaging element(13) to a ligament(2) an engaging element(13) is provided with a recess(18) in which a clamping element(19) is situated.
Patent KR-20000010606-A (KR)
Title: Methods and compositions for regulating t cell subsets by modulating transcription factor activity
Inventor: LAURIE H GLIMCHER
IPC: A61K39/395
Filed: 1997-04-23
Abstract: PURPOSE: Methods and compositions for regulating cytokine gene expression, especially interlukine-4 which is related to T helper type 2(Th2) and T cell subsets by modulating transcription factor activity are prepared. CONSTITUTION: Through several experiments, modulation transcription factors that cooperate with NF-AT family proteins to regulate expression of a Th-2 as ociated cytokine gene is found as Th2 specific maf family protein like c-maf, NIP45 and p18. One of these factors or their combinations are involved in modulation methods which also contain the modulation of Th2-associated cytokine generation by contacting various working agents (activator, inhibitor or so) that modulate the expression or activation of transcription factors.
Patent KR-20000016052-A (KR)
Title: Morphinane derivatives and medicinal use thereof
Inventor: NAGASE HIROSHI
IPC: C07D489/12
Filed: 1998-03-27
Abstract: PURPOSE: A morphinane derivative having an agonistic or antagonistic activity as a compound capable of binding to opioid epsilon-receptors and pharmacologically acceptable salts thereof are provided. CONSTITUTION: Novel morphinane derivatives having an agonist or antagonist activity as a compound capable of binding to opioid epsilon-receptors and pharmacologically acceptable salts thereof. These derivatives are represented by general formula (I). Herein, R1 is hydrogen, hydroxy, C1-C5 alkoxy, C1-C5 alkanoyloxy or C7-C13 aralkyloxy; R2 is hydrogen or C1-C5 alkyl; and R3 and R4 are independently hydrogen, fluorine, chlorine, bromine, iodine, C1-C5 alkyl or phenyl.
Patent KR-19990068002-A (KR)
Title: 자체 직립식 골프 가방용 골프가방 스트랩 시스템
IPC: A45F3/12
Filed: 1999-01-20
Abstract: 본 발명을 따르는 가방은 상측 연장부와 인접하게 고정되고 피봇운동하는 한쌍의 레그(leg)들을 가진 자체직립식 가방이다.  가방이 지면으로 부터 들어올려질 때, 상기 레그들이 접혀진다.  한쌍의 스트랩들에 의해 가방은 사용자의 어깨위에서 등에 매는 식으로 운반가능하다.  또한 사용자에 가해지는 가방의 중량을 경감시키도록, 각각의 스트랩들은 부분적으로 젤(gel)로 채워진다.  또한, 충격흡수장치에 의해 각각의 스트랩에 구성된 상측부분이 가방에 고정된다.  한쌍의 스프링에 의해 상호연결되는 상측 및 하측의 부품들이 상기 충격흡수장치에 포함된다.
Patent KR-20000052113-A (KR)
Inventor: KIM JEONG HYUN
IPC: G01R31/3183
Filed: 1999-01-29
Abstract: PURPOSE: A test signal generating circuit of semiconductor device is provided to achieve improvements enabling a test mode to be easily performed without any additional pad for testing. CONSTITUTION: A test signal generating circuit comprises a first input terminal for receiving an external clock signal, a second input terminal for receiving a signal for controlling starting and stopping of test mode, a third input terminal for receiving a pulse signal for generating the test signal, and a test signal generating unit. The test signal generating unit generates the test signal by receiving the pulse signal at a state where the test mode start signal is enabled, and stops the generation of the test signal by receiving test mode stop signal. The test mode start signal is enabled when the external clock signal is level 1 and the control signal shifts from level 3 to level 4, and disabled when the clock signal shifts to level 2. The test mode stop signal is enabled when the external clock signal is level 1 and the control signal shifts from level 4 to level 3.